@charset "utf-8";

/* ============================================
   텔레그램 비밀대화 PC 미지원 가이드
   접두사: tg-sec- (기존 사이트 오염 방지)
   컬러 톤: 다크 슬레이트 + 일렉트릭 시안(Electric Cyan)
============================================ */

:root {
    --tgsc-dark: #0f172a;
    --tgsc-dark-mid: #1e293b;
    --tgsc-dark-light: #334155;
    --tgsc-cyan: #06b6d4;
    --tgsc-cyan-dark: #0891b2;
    --tgsc-cyan-light: #ecfeff;
    --tgsc-cyan-border: #67e8f9;
    --tgsc-amber: #f59e0b;
    --tgsc-amber-light: #fffbeb;
    --tgsc-amber-border: #fde68a;
    --tgsc-green: #10b981;
    --tgsc-green-light: #ecfdf5;
    --tgsc-red: #ef4444;
    --tgsc-red-light: #fef2f2;
    --tgsc-slate-900: #0f172a;
    --tgsc-slate-700: #334155;
    --tgsc-slate-500: #64748b;
    --tgsc-slate-300: #cbd5e1;
    --tgsc-slate-200: #e2e8f0;
    --tgsc-slate-100: #f1f5f9;
    --tgsc-bg: #f0f4f8;
    --tgsc-white: #ffffff;
    --tgsc-radius: 14px;
}

/* ─── 래퍼 ─── */
.tg-sec-wrapper {
    max-width: 1100px;
    margin: 0 auto;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    color: var(--tgsc-slate-500);
    background-color: var(--tgsc-bg);
    box-sizing: border-box;
    line-height: 1.7;
    overflow: hidden;
    padding-bottom: 60px;
}

.tg-sec-wrapper *,
.tg-sec-wrapper *::before,
.tg-sec-wrapper *::after {
    box-sizing: inherit;
    margin: 0;
    padding: 0;
}

.tg-sec-wrapper strong {
    font-weight: 700;
    color: var(--tgsc-slate-900);
}

.tg-sec-wrapper mark {
    background: linear-gradient(120deg, var(--tgsc-cyan-light) 0%, #cffafe 100%);
    color: var(--tgsc-cyan-dark);
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
}

/* ─── kbd 키캡 ─── */
.tg-sec-kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 34px;
    padding: 0 10px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 13px;
    font-weight: 700;
    color: var(--tgsc-dark);
    background: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
    border: 1px solid var(--tgsc-slate-300);
    border-bottom: 3px solid var(--tgsc-slate-300);
    border-radius: 6px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.tg-sec-plus {
    font-size: 14px;
    font-weight: 700;
    color: var(--tgsc-cyan-border);
    margin: 0 4px;
}

.tg-sec-wrapper kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 22px;
    padding: 0 6px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 11px;
    font-weight: 700;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0.05) 100%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    color: var(--tgsc-cyan-border);
    vertical-align: middle;
}

/* ─── 히어로 헤더 ─── */
.tg-sec-hero {
    background: linear-gradient(145deg, #020617 0%, #0f172a 30%, #164e63 70%, #06b6d4 100%);
    color: var(--tgsc-white);
    padding: 60px 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.tg-sec-hero::before {
    content: "";
    position: absolute;
    width: 360px;
    height: 360px;
    border: 60px solid rgba(6, 182, 212, 0.05);
    border-radius: 50%;
    top: -100px;
    right: -100px;
}

.tg-sec-hero::after {
    content: "";
    position: absolute;
    width: 220px;
    height: 220px;
    border: 40px solid rgba(103, 232, 249, 0.04);
    border-radius: 50%;
    bottom: -60px;
    left: -50px;
}

.tg-sec-hero__inner {
    position: relative;
    z-index: 1;
}

.tg-sec-hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: rgba(6, 182, 212, 0.12);
    color: var(--tgsc-cyan-border);
    font-size: 14px;
    font-weight: 700;
    padding: 8px 20px;
    border-radius: 100px;
    margin-bottom: 22px;
    border: 1px solid rgba(103, 232, 249, 0.15);
    backdrop-filter: blur(4px);
}

.tg-sec-hero__badge i {
    font-size: 16px;
}

.tg-sec-hero__title {
    font-size: 28px;
    font-weight: 900;
    line-height: 1.35;
    margin-bottom: 18px;
    color: var(--tgsc-white);
}

.tg-sec-hero__desc {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.6);
    max-width: 620px;
    margin: 0 auto;
}

/* ─── 메인 ─── */
.tg-sec-main {
    padding: 30px 20px 0;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* ─── 도입부 ─── */
.tg-sec-intro {
    background-color: var(--tgsc-white);
    padding: 28px 24px;
    border-radius: var(--tgsc-radius);
    border-left: 4px solid var(--tgsc-cyan);
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
}

.tg-sec-intro p {
    font-size: 16px;
    margin-bottom: 14px;
}

.tg-sec-intro p:last-child {
    margin-bottom: 0;
}

/* ─── 섹션 공통 ─── */
.tg-sec-section {
    background-color: var(--tgsc-white);
    padding: 34px 24px;
    border-radius: var(--tgsc-radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    border: 1px solid var(--tgsc-slate-200);
}

.tg-sec-section--dark {
    background: linear-gradient(135deg, var(--tgsc-dark) 0%, var(--tgsc-dark-mid) 100%);
    border-color: var(--tgsc-dark-light);
    color: var(--tgsc-slate-300);
}

.tg-sec-section__head {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 16px;
}

.tg-sec-section__num {
    font-size: 38px;
    font-weight: 900;
    color: var(--tgsc-cyan);
    opacity: 0.2;
    line-height: 1;
    flex-shrink: 0;
}

.tg-sec-section__num--light {
    color: var(--tgsc-cyan-border);
    opacity: 0.3;
}

.tg-sec-section__title {
    font-size: 20px;
    font-weight: 800;
    color: var(--tgsc-slate-900);
    line-height: 1.35;
    padding-top: 6px;
}

.tg-sec-section__title--light {
    color: var(--tgsc-white);
}

.tg-sec-section__desc {
    font-size: 16px;
    margin-bottom: 24px;
}

.tg-sec-section__desc--light {
    color: var(--tgsc-slate-300);
}

.tg-sec-section__desc--light strong {
    color: var(--tgsc-white);
}

.tg-sec-section__result {
    font-size: 14px;
    color: var(--tgsc-cyan-dark);
    font-weight: 600;
    background-color: var(--tgsc-cyan-light);
    padding: 12px 16px;
    border-radius: 8px;
    margin-top: 16px;
    border-left: 3px solid var(--tgsc-cyan-border);
}

.tg-sec-section__result i {
    color: var(--tgsc-cyan);
    margin-right: 6px;
}

/* ─── 이유 카드 ─── */
.tg-sec-reasons {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 16px;
}

.tg-sec-reason {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background-color: var(--tgsc-slate-100);
    padding: 20px;
    border-radius: 10px;
}

.tg-sec-reason__icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--tgsc-dark) 0%, var(--tgsc-dark-mid) 100%);
    color: var(--tgsc-cyan);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.tg-sec-reason__title {
    font-size: 16px;
    font-weight: 700;
    color: var(--tgsc-slate-900);
    margin-bottom: 4px;
}

.tg-sec-reason__text {
    font-size: 14px;
}

/* ─── 암호화 비주얼 ─── */
.tg-sec-encrypt-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 24px 16px;
    background-color: var(--tgsc-slate-100);
    border-radius: 12px;
    flex-wrap: wrap;
}

.tg-sec-encrypt-visual__device {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 16px 24px;
    border-radius: 12px;
    min-width: 120px;
}

.tg-sec-encrypt-visual__device i:first-child {
    font-size: 28px;
}

.tg-sec-encrypt-visual__device span:first-of-type {
    font-size: 13px;
    font-weight: 700;
    color: var(--tgsc-slate-900);
}

.tg-sec-encrypt-visual__device--mobile {
    background: linear-gradient(135deg, var(--tgsc-green-light) 0%, #d1fae5 100%);
    border: 1px solid #86efac;
}

.tg-sec-encrypt-visual__device--mobile i:first-child {
    color: var(--tgsc-green);
}

.tg-sec-encrypt-visual__device--pc {
    background: linear-gradient(135deg, var(--tgsc-red-light) 0%, #fee2e2 100%);
    border: 1px solid #fca5a5;
}

.tg-sec-encrypt-visual__device--pc i:first-child {
    color: var(--tgsc-red);
}

.tg-sec-encrypt-visual__status {
    font-size: 11px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 4px;
}

.tg-sec-encrypt-visual__status--ok {
    color: var(--tgsc-green);
}

.tg-sec-encrypt-visual__status--no {
    color: var(--tgsc-red);
}

.tg-sec-encrypt-visual__arrow {
    font-size: 20px;
    color: var(--tgsc-red);
    font-weight: 900;
}

/* ─── 스텝 리스트 ─── */
.tg-sec-steps {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.tg-sec-step {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background-color: var(--tgsc-slate-100);
    padding: 16px 18px;
    border-radius: 10px;
    border-left: 3px solid var(--tgsc-cyan-border);
    transition: border-left-color 0.2s ease;
}

.tg-sec-step:hover {
    border-left-color: var(--tgsc-cyan);
}

.tg-sec-step--dark {
    background-color: rgba(255, 255, 255, 0.05);
    border-left-color: rgba(103, 232, 249, 0.3);
    color: var(--tgsc-slate-300);
}

.tg-sec-step--dark:hover {
    border-left-color: var(--tgsc-cyan);
}

.tg-sec-step--dark strong {
    color: var(--tgsc-white);
}

.tg-sec-step__marker {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--tgsc-cyan) 0%, var(--tgsc-cyan-dark) 100%);
    color: var(--tgsc-white);
    font-weight: 800;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-top: 1px;
}

.tg-sec-step__text {
    font-size: 15px;
    padding-top: 3px;
}

.tg-sec-step__text p {
    margin-bottom: 10px;
}

/* ─── 타이머 옵션 뱃지 ─── */
.tg-sec-timer-options {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tg-sec-timer-option {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    font-weight: 700;
    color: var(--tgsc-cyan-dark);
    background-color: var(--tgsc-cyan-light);
    padding: 5px 12px;
    border-radius: 100px;
    border: 1px solid var(--tgsc-cyan-border);
}

.tg-sec-timer-option i {
    font-size: 11px;
}

/* ─── 인라인 팁 ─── */
.tg-sec-tip-inline {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background-color: var(--tgsc-amber-light);
    border: 1px solid var(--tgsc-amber-border);
    padding: 16px 18px;
    border-radius: 10px;
    margin-top: 16px;
}

.tg-sec-tip-inline__icon {
    flex-shrink: 0;
    font-size: 20px;
    color: var(--tgsc-amber);
    margin-top: 1px;
}

.tg-sec-tip-inline__label {
    display: block;
    font-size: 13px;
    font-weight: 800;
    color: #92400e;
    margin-bottom: 4px;
}

.tg-sec-tip-inline__text {
    font-size: 14px;
    color: #a16207;
}

/* ─── 단축키 카드 ─── */
.tg-sec-shortcut-card {
    display: flex;
    align-items: center;
    gap: 18px;
    background-color: rgba(6, 182, 212, 0.08);
    border: 1px solid rgba(103, 232, 249, 0.2);
    padding: 18px 22px;
    border-radius: 12px;
    margin-top: 16px;
}

.tg-sec-shortcut-card__keys {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 4px;
}

.tg-sec-shortcut-card__desc {
    font-size: 14px;
    color: var(--tgsc-slate-300);
}

.tg-sec-shortcut-card__desc strong {
    color: var(--tgsc-white);
}

/* ─── 결론 및 요약 ─── */
.tg-sec-summary {
    background: linear-gradient(135deg, #020617 0%, var(--tgsc-dark) 50%, #164e63 100%);
    color: var(--tgsc-white);
    padding: 44px 28px;
    border-radius: var(--tgsc-radius);
    text-align: center;
    box-shadow: 0 10px 30px rgba(2, 6, 23, 0.4);
}

.tg-sec-summary__title {
    font-size: 24px;
    font-weight: 800;
    color: var(--tgsc-white);
    margin-bottom: 20px;
}

.tg-sec-summary__body p {
    font-size: 16px;
    margin-bottom: 14px;
    color: var(--tgsc-cyan-border);
}

.tg-sec-summary__body p:last-child {
    margin-bottom: 0;
}

.tg-sec-summary strong {
    color: var(--tgsc-white);
}

/* 체크리스트 */
.tg-sec-summary__checklist {
    list-style: none;
    display: inline-block;
    text-align: left;
    background-color: rgba(255, 255, 255, 0.05);
    padding: 24px 32px;
    border-radius: 12px;
    margin: 24px 0;
}

.tg-sec-summary__checklist li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 10px;
    font-size: 15px;
    color: #cffafe;
}

.tg-sec-summary__checklist li:last-child {
    margin-bottom: 0;
}

.tg-sec-summary__checklist li::before {
    content: "\f00c";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 2px;
    font-size: 13px;
    color: var(--tgsc-cyan);
}

.tg-sec-summary__checklist strong {
    color: var(--tgsc-white);
}

.tg-sec-summary__footer {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 14px;
    color: var(--tgsc-cyan-border);
    line-height: 1.8;
}

.tg-sec-summary__footer strong {
    color: var(--tgsc-white);
}

/* ============================================
   반응형 미디어 쿼리 (모바일 퍼스트)
============================================ */
@media (min-width: 768px) {
    .tg-sec-hero {
        padding: 80px 40px;
    }

    .tg-sec-hero__title {
        font-size: 38px;
    }

    .tg-sec-main {
        padding: 40px 36px 0;
        gap: 40px;
    }

    .tg-sec-intro {
        padding: 36px 32px;
    }

    .tg-sec-section {
        padding: 40px 36px;
    }

    .tg-sec-section__title {
        font-size: 24px;
    }

    .tg-sec-section__num {
        font-size: 44px;
    }

    /* 이유 2열 */
    .tg-sec-reasons {
        grid-template-columns: repeat(2, 1fr);
    }

    .tg-sec-summary {
        padding: 56px 44px;
    }
}

@media (min-width: 1024px) {
    .tg-sec-hero__title {
        font-size: 44px;
    }

    .tg-sec-main {
        gap: 46px;
    }
}

/* ============================================
   스크롤 등장 애니메이션 (JS 연동)
============================================ */
.tg-sec-motion {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

.tg-sec-motion.is-visible {
    opacity: 1;
    transform: translateY(0);
}